Site edited in HTTPS does not work in HTTP

I have a site that I require HTTPS to login/admin the site. this is to protect password transmission over the internet. It is using a self-signed certificate that will throw errors, but only to the people I allow to login and edit the site. I do not want this site to run as HTTPS to the public but HTTP.

When I create/edit things logged in (via https), then log back out, images don’t display. Looking at the code, images point to https://blahblah/wp-content/uploads/joe.123 – when it should be http://blahblah…

How can I correct this? using rewrite to rewrite all https to http doesn’t seem to solve the issue since the source code is still calling https content and I am getting mixed content/insecure errors.

Thank you for any guidance – I’ve tried searching but can only find moving to https.

To repeat – Admin should only be https (which I’ve enabled via the WP_Config file), public should all just be http.

Thanks!